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How does Green Cities reduce air pollution?

Through helping to cool urban areas and mitigate the urban heat island effect, green spaces also help address air pollution by reducing the formation of photochemical ozone. Shade provided by urban trees also reduces energy demand, indirectly contributing to improved air quality.

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.